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Carrier 30gx and 30hx process chillers issues

2 carrier process chillers at 2 different locations-- 1 is air cooled and 1 is water cooled. Typical senario---- chiller sits idle or unloaded and as a process batch is made the chiller is balls to the wall and then batch is complete the chiller is running unloaded or idle again.

Due to low ambients and intermittent loads i am having the same issue on both chillers - low oil level alarms. neither chiller is equipped with mininum load valves. the air-cooled has motor masters and the water-cooled has a modulating valve on condenser water.(note-- no issues with chillers until low ambient issues occur.)

I need some suggestions. i don't think mlv will be enough and then there is the issue of no hot gas port on chiller barrel even if i wanted to install one.

The compressors on these chillers do not have CC heaters. The MLV's would probably help with your oil problems. The port is there, with a plug in it. Not hard to pipe in and wire. Need to program the controller so that it knows the MLV is there. Check under the Setpoint heading, where you set the chill water setpoint. Make sure the settings for Head is 85 degrees for the HX and 113 degrees for the GX.